One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(11,15)(13,16)(17,18)(19,28)(20,25)(21,35)(22,27)(23,30)(24,33)(26,36)(29,43)(31,44)(32,42)(34,40)(37,48)(38,46)(39,47)(41,45) involution — undirected(9,10)(11,16)(12,14)(13,15)(17,19,21,30,22,31,36,47)(18,23,26,28,27,39,35,44)(20,32,34,48,33,29,45,46)(24,38,40,43,25,37,41,42)(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,13,14,16)(17,20)(18,24)(19,29)(21,34)(22,33)(23,37)(25,27)(26,40)(28,42)(30,46)(31,32)(35,41)(36,45)(38,39)(43,44)(47,48)(10,14)(13,16)(17,20)(18,25)(19,29)(21,34)(22,33)(23,38)(24,27)(26,41)(28,43)(30,46)(31,32)(35,40)(36,45)(37,39)(42,44)(47,48) involution — undirected(1,4,5,3)(2,6,7,8)(20,33)(24,25)(29,32)(34,45)(37,38)(40,41)(42,43)(46,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.